chore: Implement unit tests for UtilHandlers class (#13222)

Signed-off-by: Kim Rader <kim.rader@swirldslabs.com>

hedera-node/hedera-util-service-impl/src/test/java/com/hedera/node/app/service/util/impl/test/handlers/UtilHandlersTest.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2024 Hedera Hashgraph, LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hedera.node.app.service.util.impl.test.handlers;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.mock;
+
+import com.hedera.node.app.service.util.impl.handlers.UtilHandlers;
+import com.hedera.node.app.service.util.impl.handlers.UtilPrngHandler;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class UtilHandlersTest {
+    private UtilPrngHandler prngHandler;
+
+    private UtilHandlers utilHandlers;
+
+    @BeforeEach
+    public void setUp() {
+        prngHandler = mock(UtilPrngHandler.class);
+        utilHandlers = new UtilHandlers(prngHandler);
+    }
+
+    @Test
+    void prngHandlerReturnsCorrectInstance() {
+        assertEquals(prngHandler, utilHandlers.prngHandler(), "prngHandler does not return correct instance");
+    }
+}